I have a Kenwood DDX9905S head unit w/ a Helix DSP Pro MK2 & a couple of Hertz amps. I have a pretty extensive library of music on my iPhone XS. Unfortunately, the Kenwood head unit will not play the Apple Hi Res. formats (ALAC or AAC). My thought has been to run a USB directly to the DSP to take advantage of the Hi Res music file. The only problem with that is - it's still my phone!... When a call comes in, I'm assuming, the phone will NOT automatically switch to Bluetooth nor will I be able to answer the call through the head unit.
Being that this is well beyond my scope of knowledge, I'm hoping some of you could provide a solution to this situation.
On a side note - I've been working with SkizeR on my setup. He was the one who originally mentioned this idea to me. But we never discussed the details.